JP2011185228A - Arrangement structure of fuel feed system parts - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an arrangement structure of fuel feed system parts capable of preventing the fuel feed system parts from being damaged due to interference with a moved engine, in a situation where an engine is made to move owing to a collision of a vehicle or the like. <P>SOLUTION: An inclined surface 53 which is inclined more downward as nearer to the rear end of a vehicle body is formed in a back end edge of an engine cover 50. A control valve 42 provided in an auxiliary fuel feed system installed in a FFV is arranged backward of the inclined surface 53 and in an upper position than the back end edge of the inclined surface 53. At a collision of the vehicle from the front, the inclined surface 53 of the engine cover 50 which is moved backward of the vehicle body together with the engine 11 is moved into an under side of the control valve 42. The control valve 42 is moved upward as the engine cover 50 is moved more rearward of the vehicle body. This can prevent the control valve 42 from being caught between the engine and a dash panel and thus from being damaged. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an arrangement structure of fuel supply system components provided in an internal combustion engine for an automobile or the like. In particular, the present invention relates to an improvement in the shape of a cover member that covers an upper portion of an internal combustion engine, and an improvement in the position where a fuel supply system component is disposed with respect to the cover member.

  2. Description of the Related Art In recent years, various types of internal combustion engines for automobiles and the like (hereinafter sometimes referred to as “engines”) are known which can use a fuel of alcohol (for example, ethanol) alone or a mixed fuel of alcohol and gasoline (for example, Patent Document 1) below.

  A vehicle equipped with this type of engine is generally called a flexible fuel vehicle (FFV), and uses alcohol as fuel to improve exhaust emissions and reduce fossil fuel consumption. The performance can be improved.

  By the way, the alcohol fuel has characteristics such that it is less volatile than gasoline fuel and hardly vaporizes in a low temperature environment. For this reason, there is a problem that the low-temperature startability of the engine deteriorates when a fuel of alcohol alone is used or when the alcohol concentration in the mixed fuel of alcohol and gasoline is relatively high.

  In response to this problem, conventionally, a technique has been proposed in which a fuel having a high gasoline concentration is used as an auxiliary fuel in addition to the fuel having a high alcohol concentration (main fuel) at the time of starting the engine at a low temperature (for example, the following patents) Reference 2).

  In this technology, as a fuel supply system, in addition to an electromagnetic fuel injection valve (main injector) that injects and supplies main fuel during engine operation other than during cold start (normal operation), auxiliary fuel is injected and supplied during cold start. A fuel injection nozzle (hereinafter referred to as a sub fuel injection nozzle) is provided. An auxiliary fuel tank that stores the auxiliary fuel is disposed, for example, in an engine room. When the engine is cold started, the auxiliary fuel in the auxiliary fuel tank is supplied to the sub fuel injection nozzle through the auxiliary fuel pipe by the auxiliary fuel pump, and is injected into the intake passage from here. The auxiliary fuel pipe extending from the auxiliary fuel pump to the sub fuel injection nozzle is provided with a control valve composed of a solenoid valve or the like. The flow rate of auxiliary fuel is adjusted. In this way, auxiliary fuel (fuel with high gasoline concentration) is injected from the sub fuel injection nozzle into the intake passage, whereby the mixture of auxiliary fuel and air is supplied into the combustion chamber, and the engine is started at a low temperature. Sex is secured.

JP 2009-36079 A JP 2008-19777 A

  By the way, in the general FFV, as described above, the auxiliary fuel supply system is disposed in the engine room. The control valve for adjusting the flow rate of the auxiliary fuel is disposed at a relatively high position in the engine room and at the rear of the engine, and is bolted to a body part (for example, a dash panel) on the vehicle body via a bracket. It is fixed by a stop.

  In the configuration in which the control valve is laid out in this way, for example, when the engine largely moves rearward of the vehicle body in the engine room at the time of a frontal collision of the vehicle, the rear surface of the engine that moves backward and the control valve interfere with each other. In some cases, this control valve may be sandwiched between the engine and the body part and damaged.

  As a configuration for avoiding such a problem, it is conceivable that the height position of the control valve is set above the upper end of the engine so that the engine moving backward does not interfere with the control valve.

  However, in this case, since it is necessary to secure an arrangement space for the control valve at a relatively high position in the engine room, a large height in the engine room is required. As a result, the arrangement height position of the engine hood (bonnet) covering the engine room is also increased, and the design freedom of the vehicle is greatly impeded, which is not practical.

  Such a problem occurs not only in the case of the control valve, but also in the case where other auxiliary fuel supply system parts are arranged behind the engine. In addition, the above-mentioned problem can occur in the same manner even when fuel supply system parts provided in the main fuel supply system (fuel supply system for injecting main fuel from the main injector) are arranged behind the engine. There is sex.

  The present invention has been made in view of such a point, and an object of the present invention is to avoid damage to fuel supply system parts due to interference with the moving engine in a situation where the engine moves due to a vehicle collision or the like. An object of the present invention is to provide an arrangement structure of fuel supply system parts that can be used.

  In order to achieve the above object, the solution of the present invention is directed to a fuel supply system component arrangement structure in which a fuel supply system component is arranged in the vicinity of a cover member attached to the upper part of an automobile internal combustion engine. . And the inclined surface which inclines below is provided in the said cover member toward the moving direction of the internal combustion engine at the time of a vehicle collision. Further, the lower surface of the fuel supply system component is positioned at the internal combustion engine movement direction side with respect to the inclined surface, and is located above the tip of the inclined surface on the internal combustion engine movement direction side. The arrangement is arranged.

  With this specific matter, when the internal combustion engine moves due to the collision load at the time of a vehicle collision, the cover member also moves in the same direction together with the internal combustion engine. As the cover member moves, the inclined surface provided on the cover member enters the lower side of the fuel supply system component and comes into contact with the lower surface of the fuel supply system component. When the cover member further moves in this state, the fuel supply system component receives an upward pressing force from the inclined surface, and the fuel supply system component moves upward. Since the fuel supply system parts move upward in this way, it is avoided that the fuel supply system parts are sandwiched between the internal combustion engine or the cover member and the vehicle body side member. Damage can be prevented.

  More specific examples of the arrangement structure of the fuel supply system parts include the following. That is, the fuel supply system component is arranged so that the lower surface thereof is parallel to the inclined surface.

  According to this configuration, when the inclined surface of the cover member that moves together with the internal combustion engine comes into contact with the lower surface of the fuel supply system component, a surface contact state occurs in which substantially the entire lower surface of the fuel supply system component contacts the inclined surface. . For this reason, the load acting on the fuel supply system components when they come into contact with each other is distributed over a wide area on the lower surface of the fuel supply system components, and the fuel supply system components are damaged by the contact with the inclined surface. Can be suppressed.

  In addition, when the tip of the internal combustion engine on the side opposite to the moving direction on the lower surface of the fuel supply system component is formed in an R shape, or the lower surface of the fuel supply system component is formed with a curved surface that bulges downward. The inclined surface of the cover member can easily enter the lower side of the fuel supply system component, and the fuel supply system component can be smoothly moved upward. Further, it is possible to reduce the impact load when the inclined surface of the cover member comes into contact with the lower surface of the fuel supply system component. In this case as well, damage to the fuel supply system component can be prevented.

  Further, as an application form of the arrangement structure of the fuel supply system parts, a main fuel supply system that supplies main fuel containing alcohol to the combustion chamber, and auxiliary fuel having a gasoline concentration higher than the main fuel is supplied to the combustion chamber. 2. Description of the Related Art An automotive internal combustion engine that includes an auxiliary fuel supply system that is supplied toward a vehicle is employed as an arrangement structure for components that constitute the auxiliary fuel supply system.

  In this case, examples of the components constituting the auxiliary fuel supply system include a control valve that adjusts the flow rate of the auxiliary fuel.

  In the present invention, the cover member of the internal combustion engine is provided with an inclined surface, and when the vehicle collides, the inclined surface of the cover member that moves together with the internal combustion engine enters the lower side of the fuel supply system component and moves the fuel supply system component upward. I am doing so. For this reason, the damage accompanying the movement of the fuel supply system parts in the moving direction of the internal combustion engine and the cover member can be prevented.

It is a figure which shows schematic structure of the intake / exhaust system of an engine which concerns on embodiment, and a fuel supply system. It is a perspective view which shows the arrangement | positioning state of an engine cover and a control valve. It is the III arrow directional view in FIG. FIG. 4 is a view corresponding to FIG. 3 for explaining an operation at the time of a vehicle front collision. FIG. 9 is a diagram corresponding to FIG. 3 in a modified example.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. This embodiment demonstrates the case where this invention is applied to the auxiliary fuel supply system mounted in FFV (Flexible Fuel Vehicle: Flexible fuel vehicle).

-Outline configuration of engine-
FIG. 1 is a diagram showing a schematic configuration of an intake / exhaust system and a fuel supply system of an engine 11 according to the present embodiment.

  The engine 11 according to the present embodiment is configured by an internal combustion engine that can operate using only alcohol or a mixed fuel in which alcohol and gasoline are mixed at an arbitrary ratio as a main fuel.

  The engine 11 includes a cylinder block 13 having a plurality of cylinders 12 and a cylinder head 14 attached to an upper portion of the cylinder block 13. Pistons 15 accommodated inside each cylinder 12 so as to be capable of reciprocating are connected to a crankshaft 17 that is an output shaft of the engine 11 via a connecting rod 16.

  An intake passage 19 for guiding outside air is communicated with the combustion chamber 18 formed for each cylinder 12. A part of the intake passage 19 is constituted by an intake port 21 formed in the cylinder head 14 and a passage 23 in a resin intake manifold 22 provided on the intake upstream side (left side in FIG. 1). ing. The upstream end of the intake port 21 is open on one side wall (left side in FIG. 1) of the cylinder head 14, and the downstream end is open on the lower surface of the cylinder head 14. The intake manifold 22 is for distributing intake air to the intake ports 21 for each cylinder 12. Further, an exhaust passage 24 for discharging the combustion gas generated in the combustion chamber 18 to the outside of the engine 11 is communicated with the combustion chamber 18 for each cylinder 12. A part of the exhaust passage 24 is constituted by an exhaust port 25 formed in the cylinder head 14. The upstream end of the exhaust port 25 opens at the lower surface of the cylinder head 14, and the downstream end opens at the other side wall (right side in FIG. 1) of the cylinder head 14.

  The cylinder head 14 is provided with an intake valve 26 and an exhaust valve 27 for each cylinder 12. Each intake valve 26 is pushed down by a cam 28 a of an intake camshaft 28 that is rotationally driven by the crankshaft 17 to open the intake port 21. Each exhaust valve 27 is pushed down by a cam 29 a of an exhaust camshaft 29 that is rotationally driven by the crankshaft 17 to open the exhaust port 25.

  An electromagnetic main fuel injection valve (hereinafter referred to as a main injector) 31 that injects main fuel toward the intake downstream side of the intake port 21 is attached to the cylinder head 14 corresponding to each cylinder 12. . The main injector 31 is connected to a main fuel tank 34 via a main fuel pipe 32 and a main fuel pump 33 (the configuration of the main fuel supply system).

  The main fuel tank 34 stores a mixed fuel (main fuel) in which alcohol and gasoline are mixed at an arbitrary ratio. For example, main fuel having an alcohol concentration of 90% or more is stored. The mixed fuel in the main fuel tank 34 is pumped to the main injector 31 through the main fuel pipe 32 by the main fuel pump 33. When the solenoid coil of the main injector 31 is energized, the core is sucked in response to the energization, and the needle valve integrated with the core moves backward from the nozzle. As a result, the nozzle hole is opened (opened), and the main fuel is injected toward the intake air downstream side of the intake port 21. The injected fuel mixes with the intake air flowing through the intake passage 19 to become an air-fuel mixture and flows into the combustion chamber 18. This air-fuel mixture is ignited by the spark discharge of the spark plug 35 and burns. The piston 15 is reciprocated by the high-temperature and high-pressure combustion gas generated at this time. The reciprocating motion of the piston 15 is transmitted to the crankshaft 17 via the connecting rod 16, and the driving force (torque) of the engine 11 is obtained by the rotation of the crankshaft 17.

  Incidentally, the alcohol fuel used in the engine 11 is less volatile than gasoline fuel, and has a characteristic that it is difficult to vaporize at low temperatures. Therefore, there is a problem that the cold startability of the engine 11 decreases as the alcohol concentration in the fuel increases, such as when the concentration of alcohol itself is high or when the ratio of alcohol in the mixed fuel is high.

  Therefore, the engine 11 uses a fuel with a high gasoline concentration in addition to the above-described fuel with a high alcohol concentration at the time of starting at a low temperature. Specifically, the latter fuel has a gasoline concentration exceeding a specified ratio. In order to distinguish between the two fuels, the former fuel is hereinafter referred to as “main fuel 36” and the latter fuel is referred to as “auxiliary fuel 37”.

  At the time of low temperature start, the auxiliary fuel 37 is injected while the main injector 31 is closed and the injection of the main fuel 36 is stopped. More specifically, when the outside air temperature is 20 ° C. or lower, a low-temperature start operation using this auxiliary fuel 37 is executed. The temperature conditions for using the auxiliary fuel 37 are not limited to the values described above, and can be arbitrarily set.

  As the auxiliary fuel 37, a fuel containing gasoline fuel at a minimum ratio or more that can guarantee engine start even at a low temperature at which engine start with the main fuel 36 is difficult is used. For example, a mixed fuel of alcohol and gasoline having a gasoline mixing ratio equal to or higher than the minimum ratio (for example, 50% or higher) is used as the auxiliary fuel 37 for starting. Of course, it is also possible to use the fuel whose gasoline mixing ratio is 100%, that is, the gasoline fuel itself as the auxiliary fuel 37.

  In order to supply the auxiliary fuel 37 for injection, in addition to the main injector 31 for supplying and supplying the main fuel 36 at the time of engine operation other than the low temperature start (normal operation), the auxiliary fuel 37 is supplied for injection at the low temperature start. An injection device (hereinafter referred to as sub fuel injection nozzle) 39 is provided corresponding to each cylinder 12. These sub fuel injection nozzles 39 are attached to the respective branch pipes (not shown) of the intake manifold 22 so as to be disposed upstream of the main injector 31 in the intake flow direction.

  An auxiliary fuel tank 38 that stores auxiliary fuel 37 is disposed in the engine room. The sub fuel injection nozzle 39 is connected to an auxiliary fuel tank 38 via an auxiliary fuel pipe 41, a control valve (fuel supply system component) 42, an auxiliary fuel pump 44, and the like. The auxiliary fuel pump 44 pumps the auxiliary fuel 37 in the auxiliary fuel tank 38 to the sub fuel injection nozzle 39 through the auxiliary fuel pipe 41. The control valve 42 is composed of an SV (solenoid valve) or the like, and adjusts the flow passage area in the auxiliary fuel pipe 41 to flow through the auxiliary fuel pipe 41 to be pumped to the sub fuel injection nozzle 39. Adjust the flow rate. Further, the auxiliary fuel pipe 41 has a two-layer structure of an inner resin tube and an outer rubber tube, and has a configuration capable of reliably preventing leakage of the auxiliary fuel 37 while having flexibility. (The configuration of the auxiliary fuel supply system).

  In this way, the auxiliary fuel 37 supplied to each sub fuel injection nozzle 39 is injected into the intake passage 19, so that it contains a lot of gasoline having high volatility and good ignitability at low temperature start. The engine 11 is started by the auxiliary fuel 37 for starting. That is, the low temperature startability can be secured in the engine 11 that can use alcohol fuel or mixed fuel. When the engine start is completed and the engine temperature (for example, the coolant temperature) rises to some extent, the flow area of the auxiliary fuel pipe 41 is reduced by the control valve 42 and the flow of the auxiliary fuel 37 is blocked or suppressed. Along with this, the fuel injection from the sub fuel injection nozzle 39 is stopped or brought to a state close thereto, and the injection of the main fuel 36 by the main injector 31 is started.

-Arrangement structure of control valve 42-
Next, the arrangement structure of the control valve 42, which is a feature of this embodiment, will be described. The feature of this embodiment is the shape of a design cover (hereinafter referred to as an engine cover) 50 covering the upper portion of the engine 11 and the position of the control valve 42 with respect to the engine cover 50.

  FIG. 2 is a perspective view showing an arrangement state of the engine cover (cover member) 50 and the control valve 42 in the engine room. In FIG. 2, the front side in the figure is the front of the vehicle body. FIG. 3 is a view taken in the direction of arrow III in FIG. 3 is a dash panel that divides the engine room and the vehicle interior.

(Configuration of engine cover 50)
The engine cover 50 is a member that is assembled to the upper portion of the engine 11 in order to prevent noise and improve the appearance of the engine 11, and is formed of, for example, a heat-resistant nylon resin reinforced with glass fiber or the like. The molding material of the engine cover 50 is not limited to this.

  The engine cover 50 includes a substantially rectangular cover main body 51 extending in a substantially horizontal direction in a state where the engine cover 50 is assembled to the upper portion of the engine 11, and a pendant bent downward by a predetermined dimension from each outer edge of the cover main body 51. .. Are provided. An oil level gauge insertion hole 51a and an engine oil injection hole 51b are formed at predetermined positions of the cover main body 51.

  As a feature of the engine cover 50, an inclined surface (slope) 53 is formed on a part of the cover main body 51 so as to incline downward toward the rear of the vehicle body. This will be specifically described below.

  The inclined surface 53 is formed around the rear end of the cover body 51 on the left side of the vehicle body (the right side in FIG. 2). More specifically, it is a position where a predetermined dimension (dimension t1 in the figure) exists from the left edge of the vehicle body in the cover main body 51, and is rearward of the length of the cover main body 51 in the longitudinal direction of the vehicle body. An inclined surface 53 is formed in a region of about 1/3 on the side. The inclination angle of the inclined surface 53 is set to 30 ° with respect to the horizontal direction (see angle α in FIG. 3), for example. This angle is not limited to this, and can be set as appropriate.

  Note that, in a part on the rear side of the vehicle body in the periphery of the formation region of the inclined surface 53, a cutout portion 54 is formed by cutting the cover main body portion 51 toward the inclined surface 53 inward (vehicle body center side). In the region where the notch 54 is formed, the drooping portion 52 is not formed. For this reason, the edge of the inclined surface 53 is formed as the edge of the cover main body 51 in an approximately half region on the vehicle body rear side in the extending direction of the inclined surface 53.

(Configuration and location of control valve 42)
Next, the configuration of the control valve 42 and the position of the control valve 42 with respect to the engine cover 50 configured as described above will be described.

  As shown in FIGS. 2 and 3, the control valve 42 has a configuration in which the outer periphery of a control valve main body 45 in which a valve body (not shown) is accommodated is covered with a valve protector 46.

  The valve protector 46 has a structure in which a valve protector upper 47 and a valve protector lower 48 are integrally assembled. The valve protector upper 47 includes an upper plate 47a, a front plate 47b, and a rear plate 47c. The valve protector lower 48 includes a lower plate 48a, a front plate 48b, and a rear plate 48c. Further, the front plate 47b, 48b of the valve protector upper 47 and the valve protector lower 48 and the rear plates 47c, 48c are joined to each other by means such as welding to constitute a frame-shaped valve protector 46. The lower end portion of the control valve main body 45 is connected to the lower plate 48a of the valve protector lower 48, so that the front plates 47b and 48b face the front side of the control valve main body 45 and the rear plates 47c and 48c. Protects the control valve body 45 by covering the rear side of the control valve body 45, the upper plate 47a covering the upper side of the control valve body 45, and the lower plate 48a covering the lower side of the control valve body 45.

  A control valve support bracket 49 is connected to the lower plate 48a of the valve protector lower 48, and the control valve support bracket 49 is integrated with a body part such as the dash panel 60 via another bracket (not shown). It is connected to. Thereby, the control valve 42 is attached to the vehicle body side. The structure for mounting the control valve 42 on the vehicle body side is not limited to this.

  Further, as shown in FIGS. 2 and 3, the control valve 42 having such a configuration with respect to the engine cover 50 is arranged such that the extending direction of the lower plate 48 a of the valve protector lower 48 is the inclined surface 53. In other words, the lower plate 48a is disposed so as to be inclined at an inclination angle of 30 ° with respect to the horizontal direction.

  The control valve 42 is disposed at a position having a predetermined dimension above the inclined surface 53 and at a rear position having a slight dimension with respect to the rear end edge of the inclined surface 53. More specifically, the front end edge (point B in FIG. 3) of the lower plate 48a of the valve protector lower 48 is on the rear side of the vehicle body with respect to the rear end edge (point A in FIG. 3) of the inclined surface 53. Located above. The distance in the vehicle longitudinal direction between the rear end edge A of the inclined surface 53 and the front end edge B of the lower plate 48a is set to be shorter than the distance between the rear end edge of the engine cover 50 and the dash panel 60. Further, the height position of the front edge B of the lower plate 48 a is set above the rear edge A of the inclined surface 53 and below the upper edge of the engine cover 50. As a result, when the engine cover 50 moves toward the dash panel 60 as the engine 11 moves during a frontal collision of the vehicle, the engine cover 50 is inclined before the engine cover 50 contacts the dash panel 60. The surface 53 comes into contact with the valve protector lower 48 of the control valve 42. Further, the front edge B of the lower plate 48a, that is, the ridge line portion between the lower plate 48a and the front plate 48b has an R shape having a predetermined radius of curvature.

  Note that the direction of movement of the engine 11 at the time of a frontal collision of the vehicle is not limited to the rear in the horizontal direction, and may be obliquely upward or obliquely downward toward the rear of the vehicle body. The position of the rear end edge (point A in FIG. 3) of the inclined surface 53 and the position of the front end edge (point B in FIG. 3) of the lower plate 48a are the same when the engine 11 moves in any direction. The inclined surface 53 of the engine cover 50 is appropriately set so as to be in a positional relationship that allows contact with the lower plate 48a.

(Operation at the time of vehicle front collision)
Next, the operation at the time of vehicle front collision in the above configuration will be described.

  At the time of a frontal collision of the vehicle, the engine 11 moves to the rear of the vehicle body in the engine room due to the collision load. As the engine 11 moves, the engine cover 50 also moves rearward of the vehicle body. When the movement amount is relatively large, first, as shown in FIG. 4A, the inclined surface 53 of the engine cover 50 that moves to the rear of the vehicle body together with the engine 11 is the lower surface of the control valve 42, that is, the valve It will contact the lower plate 48a of the protector lower 48. As described above, since the extension direction of the lower plate 48a of the valve protector lower 48 is set to be parallel to the extension direction of the inclined surface 53, the inclined surface 53 contacts the lower plate 48a of the valve protector lower 48. When contact is made, the lower plate 48 a is in a surface contact state in which substantially the entire lower surface of the lower plate 48 a contacts the inclined surface 53. For this reason, when the inclined surface 53 of the engine cover 50 comes into contact with the control valve 42, the load acting on the control valve 42 is dispersed over a wide range of the lower plate 48 a. It is possible to prevent the control valve 42 from being damaged.

  When the engine 11 further moves from this state, the engine cover 50 also moves in the same direction. At this time, the control valve 42 moves relative to the engine cover 50 along the inclined surface 53, that is, as the engine cover 50 moves toward the rear of the vehicle body as shown in FIG. 4B. By receiving the upward pressing force from the inclined surface 53, the control valve 42 gradually moves upward.

  In this way, the control valve 42 moves upward as the engine cover 50 moves rearward, so that the control valve 42 is sandwiched between the engine 11 or the engine cover 50 and the dash panel 60. The situation is avoided and damage to the control valve 42 is prevented. As a result, fuel leakage from the control valve 42 is surely avoided.

  Further, as described above, since the ridge line portion between the lower plate 48a and the front plate 48b has an R shape having a predetermined radius of curvature, the inclined surface 53 of the engine cover 50 enters the lower side of the control valve 42. This facilitates the upward movement of the control valve 42 described above.

  As the control valve 42 moves upward, a tensile load or a compressive load may act on the auxiliary fuel pipe 41 connected to the control valve 42. As described above, the structure is a two-layer structure of an inner resin tube and an outer rubber tube, and has flexibility. For this reason, the said load can be absorbed and the auxiliary fuel piping 41 does not come off from the control valve 42, or the auxiliary fuel piping 41 is not damaged.

-Modification-
Next, a modified example will be described. In this modification, a part of the shape of the control valve 42 is different from that of the above-described embodiment. Since other configurations are the same as those of the above embodiment, only differences from the above embodiment will be described here.

  FIG. 5 is a view corresponding to FIG. 3 in the present modification. As shown in FIG. 5, the control valve 42 in the present modification is formed in a curved shape formed by a lower plate 48a of the valve protector lower 48 bulging downward.

  According to such a shape of the lower plate 48a, the engine cover 50 moves rearward with the rearward movement of the engine 11, and when the inclined surface 53 of the engine cover 50 contacts the lower plate 48a, the lower plate 48a is moved. The impact load on 48a can be reduced. Thereby, damage to the control valve 42 can be prevented more reliably, and fuel leakage from the control valve 42 is reliably avoided.

-Other embodiments-
In the embodiment and the modification described above, the case where the present invention is applied to the auxiliary fuel supply system mounted on the FFV has been described. The present invention is not limited to this, and can also be applied to an arrangement structure of fuel supply system components provided in a main fuel supply system (a fuel supply system that injects main fuel from the main injector 31).

  In the above embodiment, the inclination angle of the lower plate 48 a of the valve protector lower 48 and the inclination angle of the inclined surface 53 are made to coincide with each other. The present invention is not limited to this, and any angle that allows the rear end edge A of the inclined surface 53 to enter the lower side of the control valve 42 when the engine cover 50 moves rearward may be used. For example, the inclination angle of the inclined surface 53 may be set larger in the range of 0 ° to 30 ° with respect to the inclination angle of the lower plate 48a of the valve protector lower 48. For example, the inclination angle of the lower plate 48a of the valve protector lower 48 is set to 20 °, the inclination angle of the inclined surface 53 is set to 40 °, or the inclination angle of the lower plate 48a of the valve protector lower 48 is set to 10 °. A configuration in which the inclination angle of the inclined surface 53 is set to 20 ° is set.

  In the embodiment and the modification, the inclined surface 53 is formed in the vicinity of the left edge of the vehicle body in the cover main body 51. The present invention is not limited to this, and the inclined surface 53 may be formed in the vicinity of the right edge of the vehicle body in the cover main body 51 or in the center in the vehicle width direction. Also in this case, the control valve 42 is disposed corresponding to the position where the inclined surface 53 is formed.

  The present invention is applicable to the configuration of the engine cover and the layout layout of the control valves that can prevent the control valves provided in the auxiliary fuel supply system mounted on the FFV from being damaged.

11 Engine (Internal combustion engine)
18 Combustion chamber 36 Main fuel 37 Auxiliary fuel 42 Control valve (fuel supply system parts)
48 Valve protector lower 48a Lower plate (lower surface of fuel supply system parts)
50 Engine cover (cover member)
53 Inclined surface

Claims (6)

An arrangement structure of fuel supply system parts in which fuel supply system parts are arranged in the vicinity of a cover member attached to an upper part of an internal combustion engine for automobiles,
The cover member is provided with an inclined surface that is inclined downward toward the moving direction of the internal combustion engine at the time of a vehicle collision,
The fuel supply system component is disposed such that a lower surface of the fuel supply system component is located at a position on the internal combustion engine moving direction side with respect to the inclined surface and above the tip of the inclined surface on the internal combustion engine moving direction side. An arrangement structure of fuel supply system parts, wherein The fuel supply system component arrangement structure according to claim 1,
An arrangement structure of fuel supply system parts, wherein the fuel supply system parts are arranged so that a lower surface thereof is parallel to the inclined surface. The fuel supply system component arrangement structure according to claim 1 or 2,
An arrangement structure of fuel supply system parts, wherein a tip part of the lower surface of the fuel supply system part on the side opposite to the moving direction of the internal combustion engine is formed in an R shape. In the fuel supply system component arrangement structure according to claim 1, 2, or 3,
An arrangement structure of fuel supply system parts, wherein the lower surface of the fuel supply system parts is formed as a curved surface bulging downward.   An internal combustion engine for an automobile comprising a main fuel supply system for supplying main fuel containing alcohol toward the combustion chamber, and an auxiliary fuel supply system for supplying auxiliary fuel having a gasoline concentration higher than that of the main fuel toward the combustion chamber In contrast, the fuel supply system component arrangement structure according to any one of claims 1 to 4, wherein the fuel supply system component arrangement structure is employed as a component arrangement structure of the auxiliary fuel supply system. In the fuel supply system component arrangement structure according to claim 5,
An arrangement structure of fuel supply system parts, wherein the component constituting the auxiliary fuel supply system is a control valve for adjusting a flow rate of the auxiliary fuel.

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